Cromwell fleetyto od varlet



GROMWELLFLEETWOOD VARLEY, OF'NEW YORK, N. Y.

Letters Patent No. 76,960, dated April 21, 1868.

IMPROVEMENT IN msom'rons son TELEGBAPHS.

- (tip fitigehult ttftttth it in time Mitts flaunt tut mating gntt offlgt same.

TO WHOM IT MAY CONCERN:

Be it known that I, Ononwum. Ftna'rwoon VARLEY, a British subject, nowresiding in New York, in the county of New York, and State of New-York,have invented certain new and useful Improvements in the Method of andMeans for Renovating or Increasing the Insulating Power of Insulatorsfor Electric Telcgraphs: and I hereby declare the following to be afull, clear, and exact description of the same.

My invention consists of improving insulating-materials or insulators,by saturating them, either by boiling, washing, or rubber, with coal-tarnaphtha, petroleum, or ,pa-raiiine-oil, or parafline-WaX. The latter is,of necessity, applied hot. The former may be applied either hot or cold,but preferably hot. In this way the insulating power of surfacesrendered defective by exposure or other cause can readily be renewed.

I likewise prepare the woodcn supports of insulators, viz, arms,brackets, or wooden pins, by saturating them with the above-namedmaterials. This is best done by boiling them in-it, before they arefixed upon the telegraph-poles, at a temperature above that of boilingwater, so as to expel the moisture; but in the case of arms alreadyfixed to the poles, 'the hot fluid is-applied on a dry day. In the caseof cracked or otherwise damaged insulators, the oil will be found best,as it penetrates the pores and cracks, and resists the rain or moisture.4

Having described myinvention, whatl claim, and desire to secure byLetters Patent, is-- 1. The use of petroleum or rparaifine-oil, coal-tarnaphtha, or pa-rafiine-wax, for renovating the insulating powcrofsurfaces rendered defective by age, exposure, or other cause, as setforth.

2. The use of the above-named materials for increasing the insulatingpower of porous or otherwise imperfeet insulators, as set forth. 7

In testimony whereof, I have signed my name to this specification beforetwo subscribing witnesses.

' o. F. VARLEY.

Witnesses:

MARCELLUS BAILEY, EDM. F. Bnown.

